It is important to choose the final time of a simulation. In fact, if the user wants to simulate the stationary solution of a semiconductor device, he have to choose an appropriate final time, in order to get the stationary state but without waiting for not-necessary long simulation run-time. At the moment, there is no algorithm which can predict the final time in order to get the stationary state of a device, so the freedom of choosing this final time is given to the user. This is also useful in the case in which the user want to study and simulate the trasient behaviour of a semiconductor device.
So, for example, if the user wants to set the final time to 5 picoseconds, this will be done by the following line of the input file